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CVE-2016-7069 Details

Description

An issue has been found in dnsdist before 1.2.0 in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client. On a 32-bit system, the pointer arithmetic used when parsing the received response to remove that record might trigger an undefined behavior leading to a crash.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:5.9 MEDIUMVector:CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069	CVE	Issue TrackingThird Party Advisory
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html	CVE	PatchVendor Advisory
http://www.securityfocus.com/bid/100509	CVE	Third Party AdvisoryVDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7069	[email protected]	Issue TrackingThird Party Advisory
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2017-01.html	[email protected]	PatchVendor Advisory
http://www.securityfocus.com/bid/100509	[email protected]	Third Party AdvisoryVDB Entry

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-20	Improper Input Validation	[email protected]
CWE-20	Improper Input Validation	[email protected]

Affected Products

Product	Versions
powerdns dnsdist	<= 1.2.0
CPE cpe:2.3:a:powerdns:dnsdist:::x86:::::* Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 9, 2019	CVE Modified	[email protected]
Jan 8, 2019	Initial Analysis	[email protected]
Sep 12, 2018	CVE Modified	[email protected]